Water-cooling system for outboard motors



Dec. 29, 1925. 1,567,512

L. J. JOHNSON WATER COOLING .SYS'EEM FORDUTBOARD MOTORS Original Filed Feb." 9, 1924 1 Z/ 1; I /Z i 7 m7, j 4 A xix 1 A a /7 .zz X /7 17 /4 A6 a J 2 06:11.3 ffirzsam IN VEN TOR.

A TTORN E Y.

'' having t Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE.

LOUIS J. JOHNSON, 0F MIEIHAWAKA, INDIANA, ASSIGNOB TO JOHNSON BROS. ENGI- NEERING CORPORATION, OF SOUTH BEND, INDIANA.

WATER-COOLING SYSTEM FOR OUTBOARD MOTORS.

Application filed February 9, 1924. Serial No. 891,001.

To all whom it may concern:

Be it known that I, LOUIS J. Jormsou, a citizen of the United States, residing at Mishawaka, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Water- Cooling Systems for Outboard Motors, of which the following is a specification.

The invention relates to water cooling s stems for outboard motors, and has for its 0 'ect to provide means whereby the proeller is utilized to force water as it is driven rearwardly by the propeller through the water jacket of the engine. Alsoto provide means whereby the suction at the forward side of the propeller is utilized for creating a suction, and materially speeding up the circulation of water in the system, as it is forced throu h the system by the water prpljected from t e rear side of the proe er.

P A further object is to provide a. cooling system for outboard motors "compr sing an intake pi e and a discharge pipe, said ipes heir intake anddischarge on s at o posite sides of the propeller, where the blades, during the rotation of the pro eller, will pass between the intake and disc arge ends of the pipes, and force water through the intake end and simultaneously suck water from the discharge end of the pipe.

A further object is to provide 111 com bination with an outboard motor, pivotally and rotatably mounted, a water cooling system, through which water is forced an driven by the propeller. blades, and sucked from the system by the propeller blades, and comprisin intake and discharge ports, disposed in 3%)Xfl0k8t, means whereby said bracket is ri idly mounted, and held in position in re ation to the propeller blades, and movable upon the pivotal or rotatable movement of the motor as a whole.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing Fi re 1 is a vertical longitudinal sectiona view through the lower ortion of the outboard motor, 6 owing the 'evice applied thereto.

Fi re 1 is a vertical longitudinal sections view through the upper portion of the outboard motor.

Referring to the drawing, the numeral 1 designates the engine casing, and 2 the water jacket thereof. The outboard motor, generally is of substantially the same type as that set forth in Patent No. 1,467,641, issued to Louis J. Johnson, Sept. 11, 1923. Extendin downwardly from the engine casing 1 1s a shaft casing 3, which casing 15 sulplported by a bracket 4 having a sleeve 5. e bracket 4 is pivotall mountedat 6 for movement in a vertica. longitudinal plane, and the shaft casin 3 is rotatabl mounted in the sleeve 5, therefore it wil be seen that the motor may be moved in a vertical plane longitudinally, and rotated in a horizontal plane as desired for changing the angle of the axis of the propeller 7 for directional steering of a boat, to which the motor is attached by'means of the bracket 8. Extending downwardl throu h the shaft casing 3 is a drive sha 9,'thelower end of which has ar connections 10 with the propeller drive shaft 11, for rotating the propeller. Heretofore pumps have been laced on outboard motors adjacent the ower ends thereof which have been driven in various ways mechanically, for instance as shown in the patent above referred to. To obviate the use of a mechanically operated pump, and utilize the water forced rearwardly in the direction of the arrow a from the propeller blades 12, a bracket 13 is provided, which bracket is carried by the rive shaft casing 3, which bracket moves with the casing during the directional steering of the boat, and during the pivotal movement of the motor as a whole, therefore it will be seen that the brackets 13 will be maintained in relative relation to the propeller blades 12 at all times during the operation of the motor. Bracket 13 is pro vided on its under side with a recess 14 through which the outer ends 15 of the propeller blades pass during the rotation of the propeller, and consequently as water is thrust rearwardly in the direction of the arrow a from the propeller, a portion thereof will be forced through the upwardly and rearwardly curved intake port 16- of the be icket 13, and thence through the intake pipe 17 which extends through and into the drive shaft casing 3 at 18. The-upper end of the pipe 17 discharges into the port 19 of the engine casing 1, and the water passes therefrom through the pipe 20, into the water jacket 2, and passes through said water jacket and is discharged through the discharge pipe 21 into the port 22, and thence through the discharge pipe 23, which extends downwardly through the drive shaft casing 3, and through the drive shaft casing at 24, from which point thewater passes through the pipe 25, and discharges into the downwardly and rearwandly curved discharge port 26 of the bracket 13, rearwardly of the propeller blades 12. 1 However dur ing the rotation of the propeller, it will be seen, as water is thrust by the propeller blades into the port 16, ajsuotion is created at the rear sides of the blades 12, which suction will suck water from the discharge port 26, and thereby the material speeding u of the circulation of water is accorn lislie It will be seen that no matter in w at direction the motor is moved in its pivotal movement, the bracket 14 will move therewith, and consequently the intake ort 16, and the discharge port 26 will be maintained in relative osition to theouter'ends of the propeller b ades 12, thereby insuring a positive operation of the device at all times, and eliminating the use of any flexible connections.

From the above it will be seen that a water cooling system is provided, which is particularly adapted for use in connection with outboard motors wherein the thrust of water from the pro eller is utilized as acirculating medium t rough the engine for cooling purpos s, and the circulation is materially increased in s ced b suction adjacent the discharge en of t e s stem, and locatedrearwardly of the prope ler.

The invention having been set forth what is claimed as new and useful is 1. The combination with an outboard motor pivotally movable in a substantially horizontal plane and having a water jacket, a propeller, of means whereby water forced rearwardly by said propeller will be forced through the water acket, said last named means being constant in relation to the propeller during the,.pivotal movement of the propeller.

2. The combination with a pivotally movable outboard motor movable in a horizoutal plane and comprising a water jacket, :1 propeller, of means whereby water forced rear wardly by said propeller will be forced through said jacket, said means comprising a water conductor having its intake end disposed rearwardly of the propeller, said last named means remaining constant in relation to the propeller during the movement of the propeller.

3. The combination with a pivoted outboard motor movable in substantially a horizontal plane and having a water acket, a propeller having blades, of means whereby water forced rearwardly by the outer ends of the blades during the rotation of the pro peller will be conveyed and forced through the water jacket, said last named means remaining constant in relation to the propeller during the pivotal movement of the motor.

4. The combination with a pivoted outboard motor having a water jacket, a proeller, of means whereby said propeller will orce water through the water jacket and suck water from the water jacket, said means remaining constant in relation to the propeller during the movement of the motor. 5. The combination with a pivoted outboard motor havin a water jacket, 9. propeller, intake and discharge pipes connected to said water jacket, the intake end of the intake pi e being disposed rearwardly of the pro ller, the discharge end of the ipe being isposed forwardly of the'prope ler, said intake and discharge ends of the pipes remaining constant in relation to the propeller during the pivotal movement of the motor and propeller.

6. The combination with a pivoted outboard motor movable in substantially a horizontal plane and having a water jacket, a propeller, an intake pipe connected to said water jacket, said intake pi having its intake and disposed rearwar ly of the propeller in a position whereby water will e orced therein by the propeller, said intake end of the pipe remaining constantin relation to the propeller during the pivotal movement of the motor.

7. The combination with an outboard motor having a water jacket, a drive shaft casing, a bladed pro eller, a bracket carried by said casing an provided with a recess through which the ends of the ropeller blades move, intake and discharge pipes connected to the water jacket and the the bracket in registration with intake and discharge ports located respectively rearwardly and forwardly of the ends of the propeller blades.

8. The combination with a pivotally mounted outboard motor having a water jacket and a propeller, of a bracket carried by and movable with said motor and arching the propeller and provided with intake and discharge ports, and pipe connections between the intake and discharge port and the water jacket.

9. The combination with pivoted outboard motor movable in substantially a horizontal plane and having a water jacket, a propeller, of means whereby the current of water produced by the propeller will induce a flow of water through the water jacket, said means remaining constant in relation to the propeller during the movement of the motor.

In testimony whereof I affix my signature.

LOUIS J. JOHNSON.

and discharge ports, and pipe connections of water produced by the propeller will in between the intake and discharge port and does a flow of water through the water the water jacket. jacket, said means remaining constant in 10 9. The combination with pivoted outrelation to the propeller during the move board motor movable in substantially as. ment of the motor.

horizontal plane and having a water jacket, In testimony whereof I afiix my signature.

a propeller, of means whereby the current LOUIS J. JOHNSON.

DISOLAI MER 1,567,512.-Louts J. Johnson, Mishawaka, Ind.- WATER-OOQLINQ SYSTEM roe OUTBOARD Morons. Patent dated December 29, 1.925. Dlsclaimer filed June 23, 1930, by the assignee, Johnson Brothers Engineering Corporation.

Therefore, enters the following disclaimer to said patent:

Hereby disclaims from the scope of claim 1 any structure except one in which the means whereby water forced rearwardly by said propeller will be forced through the water jacket, includes a frame pivotally turnable relatively to the motor drive shaft for steering which frame is provided with a duct or ducts disposed within the confines of its exterior surfaces and through which the circulating water flows.

Hereby disclaims from the scope of claim 2 any structure except one in which the water conductor having its intake end disposed rearwardly of the propeller, is disposed within the confines of the exterior surfaces of a frame which is pivotally turnablc relatively to the motor drive shaf t for steering.

Hereby disclaims from the scope of claim 3 any structure except one in which the means whereby water forced rcarwardly by the outer ends of the blades during the rotation of the propeller will bc onveyed and forced though the water jacket," includes a frame pivotally turnablc relatively to the motor drive shaft for steering which frame is provided with a duct or ducts disposed within the cont 2 ms of its exterior surfaces and through which the circulating water flows.

Hereby disclaims from the scope of claim 4, any structure except one in which the means whereby said propeller will force water through the water jacket and suck water from the water jacket, includes a frame pivotally turnable relatively to the motor drive shaft for steering, which frame is provided with a duct or ducts disposed within the confines of its exterior surfaces and through which the circulating water llows.

Hereby disclaims from the scope of claim 5 any structure except one in which said intake and discharge ends of the pipes are located within the confines of the exterior surfaces of a frame pivotally turnable relatively to the motor drive shaft for steerlng.

Hereby disclaims from the scope of claim 6 any structure except one in which said intake pipe having its intake end is located within the confines of the exterior surfaces of a frame pivotally turnablc relatively to the motor drive shaft for steering.

Hereby disclaims from the scope of claim 9 any structure except one in which the means whereby the current of water produced by the ropeller will induce a flow of water through the water jacket includes a frame pivota 1y turnable relatively to the motor drive shaft f or steering, which frame includes within its exterior surfaces a duct or ducts through which the circulating water flows.

{Qfliciol Gazette July 15, 1.930.]

DISCLAIMER l.567,512.-L0ml8 J. Johnson, Mishawaka, Ind. WATER-COOLING SYSTEM FOR OUTBOARD Moroast Patent dated December 29, L925, Disclaimer filed June 23, 1930, by the assignee, Johnson Brothers Engineering Corporation Therefore, enters the following disclaimer to said patent:

Hereby disclaims from the scope of claim 1 any structure except one in which the means whereby water forced rearwardly by said propeller will be forced through the water jacket, includes a frame pivotally turnable relatively to the motor drive shaft for steering which frame is provided with a duct or ducts disposed within the confines of its exterior surfaces and through which the circulating water flows Hereby disclaims from the scope of claim 2 any structure except one in which the water conductor having its intake end disposed rearwardly of the propeller, is disposed within the confines of the exterior surfaces of a frame which is pivotally turnahle relatively to the motor drive shaft for steering.

Hereby disclaims from the scope of claim 3 anv structure except one in which the means whereby water forced rcarwardly by the outer ends of the blades during the rotation of the propeller will be conveyed and forced though the water jacket," includes a frame pivotally turnablc relatively to the motor drive shaft for steering which frame is provided with a duct or ducts disposed within the coni'rues of its exterior surfaces and through which the circulatin a ater flows.

Hereby disclaims from the scope of claim 4, any structure ex ept one in which the mean whereby said propeller will force water through the water jacket and suck water from the water jacket," includes a frame pivotally turnahle relatively to the motor drive shaft for steering, which frame is provided with a duct or ducts dis posed within the confines of its exterior surfaces and through which the circulating water flows.

Hereby disclaims from the scope of claim 5 any structure except one in which "said intake and discharge ends of the pipes are located within the confines of the exterior surfaces of a frame pivotally turnable relatively to the motor drive shaft for steering.

Hereby disclaims from the scope of claim 6 any structure except one in which "said intake pipe having its intake end is located within the confines of the exterior urfaces of a frame pivotally turnahle relatively to the motor drive shaft for steering.

Hereby disclaims from the scope of claim 9 any structure except one in which the means whereby the current of water produced by the ropeller will induce a flow of water through the water jacket includes a frame pivota ly turnable relatively to the motor drive shaft for steering, which frame includes within its exterior surfaces a duct or ducts through which the circulating water flows.

[Ojficial Gazette July 15, 1930.] 

